CN101742784A - LED lamp and drive circuit thereof - Google Patents
LED lamp and drive circuit thereof Download PDFInfo
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- CN101742784A CN101742784A CN201010105367A CN201010105367A CN101742784A CN 101742784 A CN101742784 A CN 101742784A CN 201010105367 A CN201010105367 A CN 201010105367A CN 201010105367 A CN201010105367 A CN 201010105367A CN 101742784 A CN101742784 A CN 101742784A
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Abstract
The invention relates to an LED lamp and a drive circuit thereof. The drive circuit comprises a rectifying unit, a voltage reduction unit, a constant current driving unit and a feedback unit, wherein in the feedback unit, the different-name end of a primary side secondary winding of a high-frequency transformer is in ground connection, the same-name end of the primary side secondary winding of the high-frequency transformer is connected with the anode of a third diode through a six resistor; the cathode of the third diode is connected to the power end of a power regulator; the anode of a light-emitting diode of a light coupler is connected to the other end of a second inductor, and the cathode of the light-emitting diode is connected with the cathode of a voltage-regulator diode through a seventh resistor; the anode of the voltage-regulator diode is in the ground connection; the collecting electrode of a triode of the light coupler is connected with the power input end of the power regulator, and the emitting electrode of the triode is connected to the feedback end of the power regulator; and the output end of the power regulator is connected to the same-name end of a primary side first winding of the high-frequency transformer. The invention can realize the driving of a low-power LED lamp.
Description
Technical field
The present invention relates to lighting technical field, more particularly, relate to a kind of LED light fixture and drive circuit thereof.
Background technology
At present at family expenses or commercial aspect lamp, general incandescent lamp or the fluorescent lamp that all also is to use, the words of considering from the angle in energy-conserving and environment-protective, useful life, exist the problem that environment and economy are brought, yet use the LED light fixture of this small-power (mainly being that 8W is following) just can improve these problems greatly, but how to realize that the driving of LED is the key issue that the LED light fixture will solve.
Summary of the invention
The technical problem to be solved in the present invention is that the above-mentioned defective at prior art provides a kind of led drive circuit, can the work of driving LED light fixture.
The technical solution adopted for the present invention to solve the technical problems is: the drive circuit of constructing a kind of LED light fixture, comprise: the rectification unit that is used for the alternating voltage of input is converted to direct voltage, be used for the direct voltage of rectification unit output is carried out the pressure unit that step-down is handled, be used to utilize the constant current driving unit of the direct voltage of described pressure unit output to LED lamp enforcement constant-current driving, and feedback unit, this unit be used to sample voltage of described pressure unit output, and with this sampled voltage and default reference voltage comparison, when voltage and the reference voltage of sampling were inconsistent, output regulation signal was to regulate the dc voltage value that described pressure unit is imported; Wherein,
Described pressure unit comprises the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, second inductance, second resistance, the 3rd resistance, the 4th resistance, first diode, second diode, high frequency transformer, wherein, one end of the 3rd electric capacity connects the output of rectification unit, the other end of the 3rd electric capacity connects the negative pole of first diode, second resistance is connected in parallel on the two ends of the 3rd electric capacity, the end of the same name of former avris first winding of high frequency transformer and the positive pole of first diode connect the conditioning signal output of feedback unit in the lump, the non-same polarity of former avris first winding of high frequency transformer connects an end of the 3rd electric capacity, the non-same polarity ground connection of the secondary side winding of high frequency transformer, the positive pole of termination of the same name second diode of the secondary side winding of high frequency transformer, the 3rd resistance and the 4th resistance are connected between the end of anodal and the 4th electric capacity of second diode, the negative pole of the other end of the 4th electric capacity and second diode is connected an end of second inductance in the lump, the 5th electric capacity is connected between the negative pole and ground of second diode, the 6th electric capacity is connected between the other end and ground of second inductance, and the other end of second inductance also connects constant current driving unit;
Described feedback unit comprises power regulator, optocoupler, the 6th resistance, the 7th resistance, the 3rd diode, voltage stabilizing didoe, wherein, the non-same polarity ground connection of former avris second winding of high frequency transformer, the end of the same name of former avris second winding of high frequency transformer connects the positive pole of the 3rd diode by the 6th resistance, the negative pole of the 3rd diode connects the power input of power regulator, the positive pole of the light-emitting diode of optocoupler connects the other end of second inductance, the negative pole of the light-emitting diode of optocoupler connects the negative pole of voltage stabilizing didoe by the 7th resistance, the plus earth of voltage stabilizing didoe, the collector electrode of the triode of optocoupler connects the power input of power regulator, the emitter of the triode of optocoupler connects the detection signal feedback end of power regulator, the end of the same name of former avris first winding of the conditioning signal output termination high frequency transformer of power regulator.
The present invention also constructs a kind of LED light fixture, comprise: the rectification unit that is used for the alternating voltage of input is converted to direct voltage, be used for the direct voltage of rectification unit output is carried out the pressure unit that step-down is handled, be used to utilize the constant current driving unit of the direct voltage of described pressure unit output to LED lamp enforcement constant-current driving, and feedback unit, this unit be used to sample voltage of described pressure unit output, and with this sampled voltage and default reference voltage comparison, when voltage and the reference voltage of sampling were inconsistent, output regulation signal was to regulate the dc voltage value that described pressure unit is imported; Wherein,
Described pressure unit comprises the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, second inductance, second resistance, the 3rd resistance, the 4th resistance, first diode, second diode, high frequency transformer, wherein, one end of the 3rd electric capacity connects the output of rectification unit, the other end of the 3rd electric capacity connects the negative pole of first diode, second resistance is connected in parallel on the two ends of the 3rd electric capacity, the end of the same name of former avris first winding of high frequency transformer and the positive pole of first diode connect the conditioning signal output of feedback unit in the lump, the non-same polarity of former avris first winding of high frequency transformer connects an end of the 3rd electric capacity, the non-same polarity ground connection of the secondary side winding of high frequency transformer, the positive pole of termination of the same name second diode of the secondary side winding of high frequency transformer, the 3rd resistance and the 4th resistance are connected between the end of anodal and the 4th electric capacity of second diode, the negative pole of the other end of the 4th electric capacity and second diode is connected an end of second inductance in the lump, the 5th electric capacity is connected between the negative pole and ground of second diode, the 6th electric capacity is connected between the other end and ground of second inductance, and the other end of second inductance also connects constant current driving unit;
Described feedback unit comprises power regulator, optocoupler, the 6th resistance, the 7th resistance, the 3rd diode, voltage stabilizing didoe, wherein, the non-same polarity ground connection of former avris second winding of high frequency transformer, the end of the same name of former avris second winding of high frequency transformer connects the positive pole of the 3rd diode by the 6th resistance, the negative pole of the 3rd diode connects the power input of power regulator, the positive pole of the light-emitting diode of optocoupler connects the other end of second inductance, the negative pole of the light-emitting diode of optocoupler connects the negative pole of voltage stabilizing didoe by the 7th resistance, the plus earth of voltage stabilizing didoe, the collector electrode of the triode of optocoupler connects the power input of power regulator, the emitter of the triode of optocoupler connects the detection signal feedback end of power regulator, the end of the same name of former avris first winding of the conditioning signal output termination high frequency transformer of power regulator.
Implement LED light fixture of the present invention and drive circuit thereof, can realize the driving of low-power LED lamp, thereby can with lamp aspect, use the LED lamp replace existing incandescent lamp or fluorescent lamp at family expenses or commercial affairs, therefore make family expenses or commercial with lamp energy-conserving and environment-protective more, longer service life.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the building-block of logic of the drive circuit embodiment one of LED light fixture of the present invention;
Fig. 2 is the circuit diagram of the drive circuit embodiment one of LED light fixture of the present invention.
Embodiment
As shown in Figure 1, in the building-block of logic of the drive circuit embodiment one of LED light fixture of the present invention, the drive circuit of this LED light fixture comprises rectification unit 100, pressure unit 200, constant current driving unit 300 and feedback unit 400, wherein, the input of rectification unit 100 is connected with alternating current, is used for converting the alternating voltage of input to direct voltage; The input of pressure unit 200 links to each other with the output of rectification unit 100, is used for the direct voltage of rectification unit 100 outputs is carried out the step-down processing; The input of constant current driving unit 300 links to each other with the output of pressure unit 200, the output of constant current driving unit 300 connects LED, be used to utilize the direct voltage of pressure unit 200 outputs that the LED lamp is implemented constant-current driving, for the work of LED provides galvanic current to press; The input of feedback unit 400 links to each other with the output of pressure unit 200, the output of feedback unit 400 links to each other with the output of rectification unit 100, direct voltage after the step-down is used to sample, and relatively with voltage of being sampled and the reference voltage of presetting, when voltage and the reference voltage of sampling were inconsistent, output regulation signal was to regulate the dc voltage value that pressure unit is imported.
In the circuit diagram of the drive circuit embodiment one of the LED light fixture of the present invention shown in Fig. 2, it is luminous that this drive circuit is used for driving LED.To introduce each unit of this drive circuit below respectively.
In rectification unit 100, the first input end of diode rectifier bridge D1 meets the live wire L that exchanges the input electricity, second input of diode rectifier bridge D1 meets the zero line N that exchanges the input electricity by fusible link F1, first output of diode rectifier bridge D1 connects an end of capacitor C 1, inductance L 1 and resistance R 4 are connected between the end of end of capacitor C 1 and capacitor C 2, and the other end of the other end of capacitor C 1, second capacitor C 2 and second output of diode rectifier bridge D1 be ground connection in the lump.
In pressure unit 200, one end of capacitor C 3 connects an end of capacitor C 2, the other end of capacitor C 3 connects the negative pole of diode D5, resistance R 5 is connected in parallel on the two ends of capacitor C 3, the end of the same name of former avris first winding of high frequency transformer T1 connects the positive pole of diode D5, the non-same polarity of former avris first winding of high frequency transformer T1 connects an end of capacitor C 3, the non-same polarity ground connection of the secondary side winding of high frequency transformer T1, the positive pole of the terminating diode D7 of the same name of the secondary side winding of high frequency transformer T1, resistance R 7 and resistance R 8 are connected between the end of the positive pole of diode D7 and capacitor C 8, the negative pole of the other end of capacitor C 8 and diode D7 is connected an end of inductance L 2 in the lump, capacitor C 7 is connected between the negative pole and ground of diode D7, and capacitor C 9 is connected between the other end and ground of inductance L 2.
In constant current driving unit 300, the power input of LED constant-current driven chip U3 connects the other end of inductance L 2, the earth terminal ground connection of LED constant-current driven chip U3, the output of LED constant-current driven chip U3 connects the positive pole of LED by inductance L 3, the minus earth of LED, the clock end of LED constant-current driven chip U3 is by capacitor C 10 ground connection, and the negative pole of diode D9 connects the output of LED constant-current driven chip U3, the plus earth of diode D9.
It is the LED constant-current driven chip of AMC7150 that LED constant-current driven chip U3 selects model for use.
In feedback unit 400, the non-same polarity ground connection of former avris second winding of high frequency transformer T1, the end of the same name of former avris second winding of high frequency transformer T1 connects the positive pole of diode D6 by resistance R 6, the negative pole of diode D6 connects the power input (VDD) of power regulator U1, the positive pole of the light-emitting diode of optocoupler U2 connects the other end of inductance L 2, the negative pole of the light-emitting diode of optocoupler U2 connects the negative pole of voltage stabilizing didoe ZD1 by resistance R 10, the plus earth of voltage stabilizing didoe ZD1, the collector electrode of the triode of optocoupler U2 connects the power input of power regulator U1, capacitor C 5 is connected between the collector electrode and ground of triode of optical coupling U2, the emitter of the triode of optocoupler U2 connects the detection signal feedback end (FB) of power regulator U1, capacitor C 11 is connected between the emitter and ground of triode of optocoupler U2, and the conditioning signal output (D) of power regulator U1 connects the end of the same name of former avris first winding of high frequency transformer T1.
The preferred model of power regulator U1 is the power regulator of VIPer12A.
The following describes the operation principle of the drive circuit of the LED light fixture in the present embodiment, the input voltage range that this drive circuit satisfies is 85V～265VAC.Behind the alternating current process diode rectifier bridge D1 of input, be transformed into direct current, inductance L 1, resistance R 4, capacitor C 1, capacitor C 2 are formed the LC filter circuits, in order to finish the processing to current harmonics.Then, capacitor C 3, resistance R 5, diode D5 absorbs direct current after treatment, guaranteed input voltage stable of high frequency transformer T1, high frequency transformer T1 carries out the step-down processing to the direct voltage of input, the low-voltage dc voltage of being exported is through diode D7 rectification, and through resistance R 7, resistance R 8, capacitor C 7, capacitor C 8, capacitor C 9, inductance L 2 obtains the constant DC pressure after absorbing Filtering Processing, this direct voltage provides operating voltage through diode D8 for LED constant-current driven chip U3, the output of LED constant-current driven chip U3 is just exported constant electric current, the operating frequency of 10 pairs of LED constant-current driven chips of capacitor C U3 compensates and coordinates, make LED constant-current driven chip U3 operating frequency satisfy output under the optimal state, thereby make LED to work under the high frequency situation, inductance L 3 has further guaranteed the constancy of output current, diode D9 prevents output voltage, electric current unusual, simultaneously, regulate the size of the adjustable size joint output constant current of resistance R 14.
Former avris second winding of high frequency transformer T1 provides operating voltage for power regulator U1, make power regulator U1 that the voltage and current regulatory function can be provided, because the negative pole of the light-emitting diode of optocoupler U2 connects the reference voltage that voltage stabilizing didoe ZD1 is provided, when the direct voltage behind the high frequency transformer T1 output buck is excessive, be that the voltage of positive pole of light-emitting diode of optocoupler U2 is when excessive, optocoupler U2 conducting, the voltage increases of the emitter of the triode of optocoupler U2, thereby make the detection signal feedback end voltage increases of power regulator U1, power regulator U1 just can reduce the output of its conditioning signal output according to the input of its detection signal feedback end, and then make the input voltage of former avris first winding of high frequency transformer T1 reduce, realized the purpose of regulating high frequency transformer T1 input voltage according to the feedback of high frequency transformer T1 output voltage like this.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within the claim scope of the present invention.
Claims (7)
1. the drive circuit of a LED light fixture, it is characterized in that, comprise: the rectification unit that is used for the alternating voltage of input is converted to direct voltage, be used for the direct voltage of rectification unit output is carried out the pressure unit that step-down is handled, be used to utilize the constant current driving unit of the direct voltage of described pressure unit output to LED lamp enforcement constant-current driving, and feedback unit, this unit be used to sample voltage of described pressure unit output, and with this sampled voltage and default reference voltage comparison, when voltage and the reference voltage of sampling were inconsistent, output regulation signal was to regulate the dc voltage value that described pressure unit is imported; Wherein,
Described pressure unit comprises the 3rd electric capacity (C3), the 4th electric capacity (C8), the 5th electric capacity (C7), the 6th electric capacity (C9), second inductance (L2), second resistance (R5), the 3rd resistance (R7), the 4th resistance (R8), first diode (D5), second diode (D7), high frequency transformer (T1), one end of the 3rd electric capacity (C3) connects the output of rectification unit, the other end of the 3rd electric capacity (C3) connects the negative pole of first diode (D5), second resistance (R5) is connected in parallel on the two ends of the 3rd electric capacity (C3), the end of the same name of former avris first winding of high frequency transformer (T1) and the positive pole of first diode (D5) connect the conditioning signal output of feedback unit in the lump, the non-same polarity of former avris first winding of high frequency transformer (T1) connects an end of the 3rd electric capacity (C3), the non-same polarity ground connection of the secondary side winding of high frequency transformer (T1), the positive pole of termination of the same name second diode (D7) of the secondary side winding of high frequency transformer (T1), the 3rd resistance (R7) and the 4th resistance (R8) are connected between the end of the positive pole of second diode (D7) and the 4th electric capacity (C8), the other end of the 4th electric capacity (C8) and the negative pole of second diode (D7) are connected an end of second inductance (L2) in the lump, the 5th electric capacity (C7) is connected between the negative pole and ground of second diode (D7), the 6th electric capacity (C9) is connected between the other end and ground of second inductance (L2), and the other end of second inductance (L2) also connects constant current driving unit;
Described feedback unit comprises power regulator (U1), optocoupler (U2), the 6th resistance (R6), the 7th resistance (R10), the 3rd diode (D6), voltage stabilizing didoe (ZD1), wherein, the non-same polarity ground connection of former avris second winding of high frequency transformer (T1), the end of the same name of former avris second winding of high frequency transformer (T1) connects the positive pole of the 3rd diode (D6) by the 6th resistance (R6), the negative pole of the 3rd diode (D6) connects the power input of power regulator (U1), the positive pole of the light-emitting diode of optocoupler (U2) connects the other end of second inductance (L2), the negative pole of the light-emitting diode of optocoupler (U2) connects the negative pole of voltage stabilizing didoe (ZD1) by the 7th resistance (R10), the plus earth of voltage stabilizing didoe (ZD1), the collector electrode of the triode of optocoupler (U2) connects the power input of power regulator (U1), the emitter of the triode of optocoupler (U2) connects the detection signal feedback end of power regulator (U1), the end of the same name of former avris first winding of the conditioning signal output termination high frequency transformer (T1) of power regulator (U1).
2. the drive circuit of LED light fixture according to claim 1, it is characterized in that, described rectification unit comprises diode rectifier bridge (D1), first inductance (L1), first electric capacity (C1), second electric capacity (C2), first resistance (R4), wherein, two inputs of diode rectifier bridge (D1) connect the two ends of input ac voltage respectively, first output of diode rectifier bridge (D1) connects an end of first electric capacity (C1), first inductance (L1) and first resistance (R4) are connected between the end of end of first electric capacity (C1) and second electric capacity (C2), the other end of first electric capacity (C1), second output of the other end of second electric capacity (C2) and diode rectifier bridge (D1) is ground connection in the lump, and an end of second electric capacity (C2) also connects an end of the 3rd electric capacity (C3).
3. the drive circuit of LED light fixture according to claim 1, it is characterized in that, described constant current driving unit comprises LED constant-current driven chip (U3), second inductance (L2), the 7th electric capacity (C10), wherein, the power input of LED constant-current driven chip (U3) connects the other end of second inductance (L2), the earth terminal ground connection of LED constant-current driven chip (U3), the output of LED constant-current driven chip (U3) connects the positive pole of LED by the 3rd inductance (L3), and the clock end of LED constant-current driven chip (U3) is by the 7th electric capacity (C10) ground connection.
4. the drive circuit of LED light fixture according to claim 3, it is characterized in that, described constant current driving unit also comprises the 5th resistance (R14), and described the 5th resistance (R14) is connected between the other end of the Current Regulation end of LED constant-current driven chip (U3) and second inductance (L2).
5. LED light fixture, it is characterized in that, comprise: the rectification unit that is used for the alternating voltage of input is converted to direct voltage, be used for the direct voltage of rectification unit output is carried out the pressure unit that step-down is handled, be used to utilize the constant current driving unit of the direct voltage of described pressure unit output to LED lamp enforcement constant-current driving, and feedback unit, this unit be used to sample voltage of described pressure unit output, and with this sampled voltage and default reference voltage comparison, when voltage and the reference voltage of sampling were inconsistent, output regulation signal was to regulate the dc voltage value that described pressure unit is imported; Wherein,
Described pressure unit comprises the 3rd electric capacity (C3), the 4th electric capacity (C8), the 5th electric capacity (C7), the 6th electric capacity (C9), second inductance (L2), second resistance (R5), the 3rd resistance (R7), the 4th resistance (R8), first diode (D5), second diode (D7), high frequency transformer (T1), wherein, one end of the 3rd electric capacity (C3) connects the output of rectification unit, the other end of the 3rd electric capacity (C3) connects the negative pole of first diode (D5), second resistance (R5) is connected in parallel on the two ends of the 3rd electric capacity (C3), the end of the same name of former avris first winding of high frequency transformer (T1) and the positive pole of first diode (D5) connect the conditioning signal output of feedback unit in the lump, the non-same polarity of former avris first winding of high frequency transformer (T1) connects an end of the 3rd electric capacity (C3), the non-same polarity ground connection of the secondary side winding of high frequency transformer (T1), the positive pole of termination of the same name second diode (D7) of the secondary side winding of high frequency transformer (T1), the 3rd resistance (R7) and the 4th resistance (R8) are connected between the end of the positive pole of second diode (D7) and the 4th electric capacity (C8), the other end of the 4th electric capacity (C8) and the negative pole of second diode (D7) are connected an end of second inductance (L2) in the lump, the 5th electric capacity (C7) is connected between the negative pole and ground of second diode (D7), the 6th electric capacity (C9) is connected between the other end and ground of second inductance (L2), and the other end of second inductance (L2) also connects constant current driving unit;
Described feedback unit comprises power regulator (U1), optocoupler (U2), the 6th resistance (R6), the 7th resistance (R10), the 3rd diode (D6), voltage stabilizing didoe (ZD1), wherein, the non-same polarity ground connection of former avris second winding of high frequency transformer (T1), the end of the same name of former avris second winding of high frequency transformer (T1) connects the positive pole of the 3rd diode (D6) by the 6th resistance (R6), the negative pole of the 3rd diode (D6) connects the power input of power regulator (U1), the positive pole of the light-emitting diode of optocoupler (U2) connects the other end of second inductance (L2), the negative pole of the light-emitting diode of optocoupler (U2) connects the negative pole of voltage stabilizing didoe (ZD1) by the 7th resistance (R10), the plus earth of voltage stabilizing didoe (ZD1), the collector electrode of the triode of optocoupler (U2) connects the power input of power regulator (U1), the emitter of the triode of optocoupler (U2) connects the detection signal feedback end of power regulator (U1), the end of the same name of former avris first winding of the conditioning signal output termination high frequency transformer (T1) of power regulator (U1).
6. the drive circuit of LED light fixture according to claim 5, it is characterized in that, described rectification unit comprises diode rectifier bridge (D1), first inductance (L1), first electric capacity (C1), second electric capacity (C2), first resistance (R4), wherein, two inputs of diode rectifier bridge (D1) connect the two ends of input ac voltage respectively, first output of diode rectifier bridge (D1) connects an end of first electric capacity (C1), first inductance (L1) and first resistance (R4) are connected between the end of end of first electric capacity (C1) and second electric capacity (C2), the other end of first electric capacity (C1), second output of the other end of second electric capacity (C2) and diode rectifier bridge (D1) is ground connection in the lump, and an end of second electric capacity (C2) also connects an end of the 3rd electric capacity (C3).
7. the drive circuit of LED light fixture according to claim 5, it is characterized in that, described constant current driving unit comprises LED constant-current driven chip (U3), second inductance (L2), the 7th electric capacity (C10), wherein, the power input of LED constant-current driven chip (U3) connects the other end of second inductance (L2), the earth terminal ground connection of LED constant-current driven chip (U3), the output of LED constant-current driven chip (U3) connects the positive pole of LED by the 3rd inductance (L3), and the clock end of LED constant-current driven chip (U3) is by the 7th electric capacity (C10) ground connection.
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| CN101925237A (en) * | 2010-08-20 | 2010-12-22 | 杭州电子科技大学 | Primary constant-current control device of isolated type flyback converter |
| CN101951716A (en) * | 2010-09-30 | 2011-01-19 | 杭州电子科技大学 | Constant-on-time primary side constant-current control device for LED driver with high power factor |
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| CN101925236A (en) * | 2010-08-20 | 2010-12-22 | 杭州电子科技大学 | Isolated high-power factor flyback type primary-side constant-current control device of LED driver |
| CN101925237B (en) * | 2010-08-20 | 2013-06-05 | 杭州电子科技大学 | Primary constant-current control device of isolated type flyback converter |
| CN101925236B (en) * | 2010-08-20 | 2013-06-05 | 杭州电子科技大学 | Isolated high-power factor flyback type primary-side constant-current control device of LED driver |
| CN101969722A (en) * | 2010-09-27 | 2011-02-09 | 海洋王照明科技股份有限公司 | LED drive circuit and LED lamp |
| CN101969722B (en) * | 2010-09-27 | 2013-12-18 | 海洋王照明科技股份有限公司 | LED drive circuit and LED lamp |
| CN101951716B (en) * | 2010-09-30 | 2013-04-03 | 杭州电子科技大学 | Constant-on-time primary side constant-current control device for LED driver with high power factor |
| CN101951716A (en) * | 2010-09-30 | 2011-01-19 | 杭州电子科技大学 | Constant-on-time primary side constant-current control device for LED driver with high power factor |
| CN102300369A (en) * | 2011-08-02 | 2011-12-28 | 李光男 | indoor lighting device |
| CN102300371A (en) * | 2011-08-02 | 2011-12-28 | 李光男 | Light source driving circuit and long tube lamp comprising same |
| CN102300368A (en) * | 2011-08-02 | 2011-12-28 | 李光男 | Light source drive circuit and workshop lamp comprising same |
| CN102297373A (en) * | 2011-08-02 | 2011-12-28 | 李光男 | Outdoor illuminating device |
| CN103369764A (en) * | 2012-03-30 | 2013-10-23 | 海洋王照明科技股份有限公司 | A LED driving circuit and a LED lamp |
| CN103369764B (en) * | 2012-03-30 | 2017-02-08 | 海洋王照明科技股份有限公司 | A LED driving circuit and a LED lamp |
| CN103390878A (en) * | 2012-05-07 | 2013-11-13 | 海洋王照明科技股份有限公司 | Lamp power output overvoltage protection circuit and lamp |
| CN104703357A (en) * | 2015-03-23 | 2015-06-10 | 深圳市稳先微电子有限公司 | Primary-side feedback LED (Light Emitting Diode) driving circuit |
| CN104703357B (en) * | 2015-03-23 | 2016-03-30 | 深圳市稳先微电子有限公司 | A kind of former limit feedback LED drive circuit |
| CN110875687A (en) * | 2018-09-04 | 2020-03-10 | 上海航空电器有限公司 | Aviation isolation type flyback switching power supply converter |
| CN109618460A (en) * | 2018-12-29 | 2019-04-12 | 广东德洛斯照明工业有限公司 | A kind of control system and method for LED light |
| CN113534879A (en) * | 2021-06-16 | 2021-10-22 | 常州高清信息技术有限公司 | Constant current source circuit |
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